AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 363
AT91SAM7S256D-AU
Manufacturer Part Number
AT91SAM7S256D-AU
Description
ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
Manufacturer
Atmel
Series
SAM7S256r
Datasheet
1.AT91SAM7S256D-AU.pdf
(775 pages)
Specifications of AT91SAM7S256D-AU
Rohs
yes
Core
ARM
Processor Series
AT91SAM
Data Bus Width
16 bit/32 bit
Maximum Clock Frequency
55 MHz
Program Memory Size
256 KB
Data Ram Size
64 KB
On-chip Adc
Yes
Operating Supply Voltage
3 V to 3.6 V
Operating Temperature Range
- 40 C to + 85 C
Package / Case
LQFP-64
Mounting Style
SMD/SMT
Interface Type
2-Wire, I2S, SPI, USART
Length
7 mm
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31.5
31.5.1
31.5.2
31.5.3
Product Dependencies
The pins used for interfacing the USART may be multiplexed with the PIO lines. The programmer must first pro-
gram the PIO controller to assign the desired USART pins to their peripheral function. If I/O lines of the USART are
not used by the application, they can be used for other purposes by the PIO Controller.
To prevent the TXD line from falling when the USART is disabled, the use of an internal pull up is mandatory. If the
hardware handshaking feature or Modem mode is used, the internal pull up on TXD must also be enabled.
All the pins of the modems may or may not be implemented on the USART. Only
the modem signals. On USARTs not equipped with the corresponding pin, the associated control bits and statuses
have no effect on the behavior of the USART.
The USART is not continuously clocked. The programmer must first enable the USART Clock in the Power Man-
agement Controller (PMC) before using the USART. However, if the application does not require USART
operations, the USART clock can be stopped when not needed and be restarted later. In this case, the USART will
resume its operations where it left off.
Configuring the USART does not require the USART clock to be enabled.
The USART interrupt line is connected on one of the internal sources of the Advanced Interrupt Controller. Using
the USART interrupt requires the AIC to be programmed first. Note that it is not recommended to use the USART
interrupt line in edge sensitive mode.
I/O Lines
Power Management
Interrupt
SAM7S Series [DATASHEET]
USART1 is
6175M–ATARM–26-Oct-12
fully equipped with all
363
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